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Method and system for providing closed loop color control between a scanned color image and the output of a color printer

  • US 5,107,332 A
  • Filed: 05/17/1989
  • Issued: 04/21/1992
  • Est. Priority Date: 05/17/1989
  • Status: Expired due to Term
First Claim
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1. A method for matching the color of an image read by a color image scanner and the printed hardcopy output of a copier or printer controlled by the scanner, which comprises the steps of:

  • a. providing a full scale color gamut based upon preselected parameters such as print media, inks, dyes, drop volumes and pen types,b. constructing an initial look up table based upon said full scale color gamut and storing said initial look up table in a computer,c. comparing a sample test pattern of input information, TPin, read by a scanner with a test pattern of output information, TPout, generated by a color printer or color copier to in turn generate a corresponding transformation matrix, H, andd. utilizing said transformation matrix H to continuously update said initial look up table, so that the color differences between the image scanned by said color scanner and the hardcopy output of a color printer or color copier are always driven toward zero, corrected and minimized.

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